Problem: An enzyme _______.A. becomes part of the final productsB. is nonspecific for substratesC. is affected by heat and pHD. is consumed by the reaction

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An enzyme is most commonly known as a biological catalyst. Being a catalyst, it speeds up the rate (kinetics) of certain reactions but maintains component concentrations at equilibrium (thermodynamics). Catalysts speed up rates of reactions by going through a mechanism that follows a different pathway, which has a significantly reduced energy of activation.